DNMT3A and Tatton-Brown-Rahman overgrowth syndrome: Genetic evaluation for tall stature and intellectual disability identified a <i>de novo</i> nonsense variant in the <i>DNMT3A</i> gene previously associated with Tatton-Brown-Rahman syndrome.<h4>Conclusion</h4>Tatton-Brown-Rahman syndrome should be considered in children with extreme tall stature and intellectual disability.